Dental post



Dec. 28 ,1926. 1,612,227

A. K. SIMMONS DENTAL POST Original Filed Au ust 24, 1922 [rm e72 {or AL FRED KJ/MMQNJ' Patented Dec. 28, 1926.

UNITE D S T T E S; P A TE OFF CE ALFRED vK. sIMMoNs, or FAnIBAuLr, MINNESOTA, AssIeNon or THIRTY-riva- ONE- nUNnnnn'rHs TO GUS N. BoosALisANn rIrrEnN oNn-nnNnnnn'rns 'ro rooms a SMITH, Born or FARIBAULT, MrNNEso'rA.

'IDENTAL FUSE.

Original application filed August 24, 1922, Serial No. 584,115. Divided and this application filed January 8, 1924. Serial No. 684,994.

This invention relates to dental posts employed for securing artificial teeth, crowns or similar articles to natural tooth roots, artificial tooth roots or equivalent therefor, commonlyemployed by the profession in accordance with present tee'hnie and practice, suchas the present vulcanite or metal plates or fixed-or removable bridges, etc.

The subject-matter of this application is divisional of. that contained in the inventors prior application, Serial No. 584,115, filed August '24, 1922'. At present artificial teeth or crowns are usually formed of porcelain or similar materials and are secured in place by means of posts and interlocking attachments made of precious or semi-precious meta-ls.commonlyemployed.in dentistry. An advantage residing in the employment of this present novel tooth-fastening is that less. metal and "more porcelain may be used and solidly, instead of thinly, constructed porcelain or teeth or crowns may be employed and the 'occlusal surfaces of the teeth may be of porcelain instead of gold. Furtherfth'e tooth or crown may be accurately adapted to the root or other fixture by grinding in order to effect an accurate union between the fixture and the crown. The crown 'isad'aptedto be cemented to this novel post so as to permit replacement. The novel post forming the subject-matter of this application, is so constructed that the occlusal surface of the artificial tooth or crown is not'li'able to displacement in use and any tendency toward axial rotation or locking of the crown with relation to the post is minimized if not absolutely prevented.

The object therefore of this invention is to provide an improved dental post.

Other objects of the invention will more fully appear from the following description and. the accompanying drawings, and will be pointed out in the annexed claims.

In the drawings there has been disclosed l a structure designed to carry out the various objects ofthe invention, but it is to be understood that the inventlon is not confined to the exact features shown, asvarlous changes may be made within the scope of the claims Figure-5 is a "view in sideel evation of an artificial tooth showing portions of its recess in dotted lines and Figure 6 is a plan View of the form of tooth or crown shown in Figure 5.

It is old in this art to implant posts or dental pins in apertures drilled into the roots of natural teeth, and it is-also oldin this art to secure artificial teeth or crowns to such implanted posts. This invention more particularly resides in the fastening means whereby the artificial teeth or crowns are held inposition, which fastening means includes the novel post shown.

More specifically the particular invention herein set forth is directed to a dental post having means depending from the post :adacent its outer or crown head. Thisno-vel post 7 is preferably formedof a suitable metal and is upwardly or inwardly tapered to facilitate its introduction into the recess provided in either a natural root or dental fixture. The post 7 is preferably of irregular contour in order that when cemented into a root recess, it may be more securely held. Such is the function of the corrugations or substantially annular shoulders 8 formed upon the post. These shoulders-extend transversely about the post and a longitudinal groove is preferably provided in the post and extends approximately the full length thereof. When the post is implanted the cement usually employed will extend within this groove and aid preventing axial rotation of the post.

A collar orbase- 11 is preferably integrally formed with the post adjacent its outer end. This base is advantageously of an irregular contour and as here shown, is formed at its front and rear with angled projections 12 preferably having rounded tips. The post outwardly terminates in an abut nent 13 which has a pair ot outwardly extending wedge-like portions 1e and L). The portion 1% is preferably longer than the portion 15. This type post and abutment is shown in the prior above-mentioned application and is not per se claimed in this application except in combination with the novel depending means shown herein.

Such depending means are here shown as a pair oi members outwardly extendin from the base upon each side of the post and such members may be termed wings. The wings 1e and 1? .re substantially alilre and each is provided with a marginal flange 18 preferably extending upon three sides of the wing as more particular-iv shown in Figure 2. F or convenience or reference, the grooved side of the post is termed the front.

The outer edge of the wings are outwardly and rearwardly inclined so that each wing is of greater length at its rear edge than it is at its front edge. The provision of the marginal flan e on the wings terms a recess in the iateal "'ace 19 of each wing, and each such face 19 is inwardly beveled or inclined toward the axis oi the post. These recessed flanged faces 19 o1 the Wings are or" advantage in securing the above-mentioned interlocking attachment by dental casting or soldering metals. It is common practice in dentistry to interlock adjacent artificial teeth, crowns, dental posts, etc., by a connection oi casting or soldering metal. Tn the case of this novel eateriorly recessed wing construction, the interlocking metal enters the lateral recesses of the wings or-of a series 01 adjacent wings when so employed. The entrance of this metal within these recesses assures a retentive interlocking attachment or the adjacent parts. The dimensions of the wings may vary in accordance with the size of the crown or body to be secured thereto. The wings are slightly arcuately curved so that the ends of the wings adjacent the channeled or grooved face of the post are tart-her apart than are the opposite wing ends. It may also be noted that the marginal flange is preferably omitted at the inner edge of each lateral wing face as is clearly shown in Figure 2.

The artificial tooth or crown 21 adapted for use with this novel post are shown in Figures 5 and 6. The deeper central recess 22 is adapted to receive the longer portion 1a; of the abutment while the recess 23 is adapted to receive the relatively shorter portion of the abutment. The base is adapted to be received within this recessed crown so that the angled recesses 24 receive the opposed projections 12. The two opposed side portions or the crown are cut away to provide the two recesses 25 adapted to have the wings l6 and 17 snugly seated therein. The crown is adapted to be secured to the post by cement as is common in the practice of dentistry. V

The wings tend to prevent any rocking of the crown with relation to the post as Well as to counteract any possible rotation of the crown on the post. The arcuate shape of the two wings as shown in Figure 1, likewise tends to prevent displacement of the crown with relation to the post.

Having thus described my invention what I claim as new and desire to secure by Lettors-Patent, is:

1. The combination of a dental post having a plurality of transverse corrugations adapted to be secured in a recess, a collar on the post adjacent its outer end, wings depending from the collar upon opposite sides of the post, the collar and wings being adapted to be secured within a suitably shaped socket in a crown or similar article, and the lateral surface of the wings being recessed.

2. The combination of a dental post having a plurality of transverse corrugations adapted to be secured in a recess, a collar on the post adjacent its outer end, wings depending trom the collar upon opposite sides ot the post, the collar being irregularly shaped, and the collar and wings being adapted to be secured within asuitably shaped socket in a crown or similar article.

3. The combination of a dental post adapted to be received within a recess in a tooth root or substitute therefor a base on the post, and means depending from the base on each side of the post, said base being irregular in contour and said depending means being arcuately curved, and said irregularly contoured base and depending means being adapted to be received within a suitably shaped socket in a crown or similar article and adapted to prevent axial rotation of the post with relation to the crown or similar article.

4. The combination of dental post adapted to be received within a recess in a tooth root or substitute therefor, an enlarged base on the post adjacent its crown-end, and a member depending from the base on each side or the post, the depending member being arcuately curved, the base and depending members being adapted to be received within a suitably shaped socket in a crown or similar article, and the depending members being adapted opposedly to embrace external portions of the crown.

5. The combination ofadental post adaptably shaped recess in a crown or similar ed to be received Within a recess in a tooth article, the outer face of each member being root or substitute therefor, a base on the recessed and inclined toward the inner end 10 post adjacent the outer end thereof, a memof the post.

5 her depending from the base on each side of In Witness whereof, I have hereunto set the post, the base and depending members my hand this 4th day of January, 1924. being adapted to be secured Within a suit- ALFRED K. SIMMONS. 

